466 lines
10 KiB
C
466 lines
10 KiB
C
/*
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* namedev.c
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*
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* Userspace devfs
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <errno.h>
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#include "list.h"
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#include "udev.h"
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#include "udev_version.h"
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#include "namedev.h"
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#define TYPE_LABEL "LABEL"
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#define TYPE_NUMBER "NUMBER"
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#define TYPE_TOPOLOGY "TOPOLOGY"
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#define TYPE_REPLACE "REPLACE"
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enum config_type {
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KERNEL_NAME = 0, /* must be 0 to let memset() default to this value */
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LABEL = 1,
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NUMBER = 2,
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TOPOLOGY = 3,
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REPLACE = 4,
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};
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#define BUS_SIZE 30
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#define FILE_SIZE 50
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#define VALUE_SIZE 100
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#define ID_SIZE 50
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#define PLACE_SIZE 50
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#define NAME_SIZE 100
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#define OWNER_SIZE 30
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#define GROUP_SIZE 30
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struct config_device {
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struct list_head node;
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enum config_type type;
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char bus[BUS_SIZE];
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char sysfs_file[FILE_SIZE];
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char sysfs_value[VALUE_SIZE];
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char id[ID_SIZE];
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char place[PLACE_SIZE];
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char kernel_name[NAME_SIZE];
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/* what to set the device to */
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int mode;
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char name[NAME_SIZE];
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char owner[OWNER_SIZE];
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char group[GROUP_SIZE];
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};
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static LIST_HEAD(config_device_list);
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static void dump_dev(struct config_device *dev)
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{
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switch (dev->type) {
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case KERNEL_NAME:
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dbg("KERNEL name ='%s'"
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" owner = '%s', group = '%s', mode = '%d'",
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dev->name,
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dev->owner, dev->group, dev->mode);
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break;
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case LABEL:
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dbg("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'"
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" owner = '%s', group = '%s', mode = '%d'",
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dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
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dev->owner, dev->group, dev->mode);
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break;
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case NUMBER:
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dbg("NUMBER name = '%s', bus = '%s', id = '%s'"
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" owner = '%s', group = '%s', mode = '%d'",
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dev->name, dev->bus, dev->id,
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dev->owner, dev->group, dev->mode);
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break;
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case TOPOLOGY:
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dbg("TOPOLOGY name = '%s', bus = '%s', place = '%s'"
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" owner = '%s', group = '%s', mode = '%d'",
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dev->name, dev->bus, dev->place,
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dev->owner, dev->group, dev->mode);
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break;
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case REPLACE:
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dbg("REPLACE name = %s, kernel_name = %s"
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" owner = '%s', group = '%s', mode = '%d'",
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dev->name, dev->kernel_name,
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dev->owner, dev->group, dev->mode);
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break;
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default:
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dbg("Unknown type of device!");
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}
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}
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#define copy_var(a, b, var) \
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if (b->var) \
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a->var = b->var;
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#define copy_string(a, b, var) \
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if (strlen(b->var)) \
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strcpy(a->var, b->var);
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static int add_dev(struct config_device *new_dev)
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{
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struct list_head *tmp;
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struct config_device *tmp_dev;
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/* loop through the whole list of devices to see if we already have
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* this one... */
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list_for_each(tmp, &config_device_list) {
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struct config_device *dev = list_entry(tmp, struct config_device, node);
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if (strcmp(dev->name, new_dev->name) == 0) {
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/* the same, copy the new info into this structure */
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copy_var(dev, new_dev, type);
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copy_var(dev, new_dev, mode);
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copy_string(dev, new_dev, bus);
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copy_string(dev, new_dev, sysfs_file);
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copy_string(dev, new_dev, sysfs_value);
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copy_string(dev, new_dev, id);
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copy_string(dev, new_dev, place);
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copy_string(dev, new_dev, kernel_name);
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copy_string(dev, new_dev, owner);
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copy_string(dev, new_dev, group);
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return 0;
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}
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}
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/* not found, lets create a new structure, and add it to the list */
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tmp_dev = malloc(sizeof(*tmp_dev));
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if (!tmp_dev)
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return -ENOMEM;
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memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
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list_add(&tmp_dev->node, &config_device_list);
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//dump_dev(tmp_dev);
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return 0;
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}
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static void dump_dev_list(void)
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{
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struct list_head *tmp;
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list_for_each(tmp, &config_device_list) {
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struct config_device *dev = list_entry(tmp, struct config_device, node);
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dump_dev(dev);
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}
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}
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static int get_value(const char *left, char **orig_string, char **ret_string)
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{
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char *temp;
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char *string = *orig_string;
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/* eat any whitespace */
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while (isspace(*string))
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++string;
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/* split based on '=' */
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temp = strsep(&string, "=");
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if (strcasecmp(temp, left) == 0) {
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/* got it, now strip off the '"' */
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while (isspace(*string))
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++string;
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if (*string == '"')
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++string;
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temp = strsep(&string, "\"");
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*ret_string = temp;
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*orig_string = string;
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return 0;
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}
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return -ENODEV;
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}
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static int get_pair(char **orig_string, char **left, char **right)
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{
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char *temp;
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char *string = *orig_string;
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/* eat any whitespace */
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while (isspace(*string))
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++string;
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/* split based on '=' */
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temp = strsep(&string, "=");
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*left = temp;
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/* take the right side and strip off the '"' */
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while (isspace(*string))
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++string;
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if (*string == '"')
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++string;
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temp = strsep(&string, "\"");
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*right = temp;
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*orig_string = string;
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return 0;
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}
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static int namedev_init_config(void)
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{
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char filename[255];
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char line[255];
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char *temp;
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char *temp2;
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char *temp3;
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FILE *fd;
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int retval = 0;
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struct config_device dev;
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strcpy(filename, NAMEDEV_CONFIG_ROOT NAMEDEV_CONFIG_FILE);
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dbg("opening %s to read as permissions config", filename);
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fd = fopen(filename, "r");
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if (fd == NULL) {
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dbg("Can't open %s", filename);
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return -ENODEV;
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}
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/* loop through the whole file */
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while (1) {
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/* get a line */
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temp = fgets(line, sizeof(line), fd);
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if (temp == NULL)
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break;
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dbg("read %s", temp);
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/* eat the whitespace at the beginning of the line */
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while (isspace(*temp))
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++temp;
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/* no more line? */
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if (*temp == 0x00)
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continue;
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/* see if this is a comment */
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if (*temp == COMMENT_CHARACTER)
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continue;
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memset(&dev, 0x00, sizeof(struct config_device));
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/* parse the line */
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temp2 = strsep(&temp, ",");
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if (strcasecmp(temp2, TYPE_LABEL) == 0) {
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/* label type */
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dev.type = LABEL;
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/* BUS="bus" */
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retval = get_value("BUS", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.bus, temp3);
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/* file="value" */
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temp2 = strsep(&temp, ",");
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retval = get_pair(&temp, &temp2, &temp3);
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if (retval)
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continue;
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strcpy(dev.sysfs_file, temp2);
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strcpy(dev.sysfs_value, temp3);
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/* NAME="new_name" */
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temp2 = strsep(&temp, ",");
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retval = get_value("NAME", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.name, temp3);
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dbg("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'", dev.name, dev.bus, dev.sysfs_file, dev.sysfs_value);
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}
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if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
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/* number type */
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dev.type = NUMBER;
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/* BUS="bus" */
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retval = get_value("BUS", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.bus, temp3);
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/* ID="id" */
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temp2 = strsep(&temp, ",");
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retval = get_value("id", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.id, temp3);
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/* NAME="new_name" */
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temp2 = strsep(&temp, ",");
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retval = get_value("NAME", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.name, temp3);
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dbg("NUMBER name = '%s', bus = '%s', id = '%s'", dev.name, dev.bus, dev.id);
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}
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if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
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/* number type */
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dev.type = TOPOLOGY;
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/* BUS="bus" */
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retval = get_value("BUS", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.bus, temp3);
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/* PLACE="place" */
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temp2 = strsep(&temp, ",");
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retval = get_value("place", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.place, temp3);
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/* NAME="new_name" */
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temp2 = strsep(&temp, ",");
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retval = get_value("NAME", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.name, temp3);
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dbg("TOPOLOGY name = '%s', bus = '%s', place = '%s'", dev.name, dev.bus, dev.place);
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}
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if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
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/* number type */
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dev.type = REPLACE;
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/* KERNEL="kernel_name" */
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retval = get_value("KERNEL", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.kernel_name, temp3);
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/* NAME="new_name" */
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temp2 = strsep(&temp, ",");
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retval = get_value("NAME", &temp, &temp3);
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if (retval)
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continue;
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strcpy(dev.name, temp3);
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dbg("REPLACE name = %s, kernel_name = %s", dev.name, dev.kernel_name);
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}
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retval = add_dev(&dev);
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if (retval) {
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dbg("add_dev returned with error %d", retval);
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goto exit;
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}
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}
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exit:
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fclose(fd);
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return retval;
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}
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static int namedev_init_permissions(void)
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{
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char filename[255];
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char line[255];
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char *temp;
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char *temp2;
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FILE *fd;
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int retval = 0;
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struct config_device dev;
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strcpy(filename, NAMEDEV_CONFIG_ROOT NAMEDEV_CONFIG_PERMISSION_FILE);
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dbg("opening %s to read as permissions config", filename);
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fd = fopen(filename, "r");
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if (fd == NULL) {
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dbg("Can't open %s", filename);
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return -ENODEV;
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}
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/* loop through the whole file */
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while (1) {
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/* get a line */
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temp = fgets(line, sizeof(line), fd);
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if (temp == NULL)
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break;
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dbg("read %s", temp);
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/* eat the whitespace at the beginning of the line */
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while (isspace(*temp))
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++temp;
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/* no more line? */
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if (*temp == 0x00)
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continue;
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/* see if this is a comment */
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if (*temp == COMMENT_CHARACTER)
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continue;
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memset(&dev, 0x00, sizeof(dev));
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/* parse the line */
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temp2 = strsep(&temp, ":");
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strncpy(dev.name, temp2, sizeof(dev.name));
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temp2 = strsep(&temp, ":");
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strncpy(dev.owner, temp2, sizeof(dev.owner));
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temp2 = strsep(&temp, ":");
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strncpy(dev.group, temp2, sizeof(dev.owner));
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dev.mode = strtol(temp, NULL, 8);
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dbg("name = %s, owner = %s, group = %s, mode = %x", dev.name, dev.owner, dev.group, dev.mode);
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retval = add_dev(&dev);
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if (retval) {
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dbg("add_dev returned with error %d", retval);
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goto exit;
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}
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}
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exit:
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fclose(fd);
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return retval;
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}
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int namedev_init(void)
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{
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int retval;
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retval = namedev_init_config();
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if (retval)
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return retval;
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retval = namedev_init_permissions();
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if (retval)
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return retval;
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dump_dev_list();
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return retval;
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}
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